lynch



J.'LYNOH.

SEWER.

Patented May 27-, 1890.

(No Model.)

I No. 429,041.

v in UNITED STATES PATENT OFFICEc JOHN LYNCH, OF. IVASHINGTON, DISTRICT OF COLUMBIA.

SEWER.

SPECIFICATION forming part of Letters Patent No. 429,041, dated May 2'7, 1890.

Application filed July 13 1889. Serial No. 317,431. (No model.)

To all whom it may concern:

Be it known that I, JOHN LYN OH, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain n ewand useful Improvements in Sewers; and I do hereby declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of the present invention is to provide a sewer-pipe constructed so that it will have auxiliary drain-flues for draining the adjacent ground outside of and independent of the sewerage. 7

As heretofore constructed sewer-pipes have been made with auxiliary drain-flues contained in the walls or in the invert of the sewer, to which connections can be made for drainage purposes. The subsoil drainage has also been dealt with by laying ordinary draintiles on each side of the pipe-sewer. These small tiles are easily displaced by the wash alongside the pipe-sewer and furnish an imperfect means of drainage, as they do not readily admit the water.

My invention consists of an impro ved sewer or drain pipe which aifords perfect drainage to the adjacent ground, thus preventing the undermining and breaking of the sewer.

In the accompanying drawings, which ill-ustrate my invention, Figure 1 illustrates a large sectional sewer with the drain-fiues contained in the invert. Fig. 2 shows a smaller pipesewer with bed-blocks which contain the drainage-flues, and Figs. 8 and i are perspective views of the bed-blocks for the joints and center portions of the pipe shown in Fig. 2.

In the case of alarge sectional sewerI make the base or invertblockA of terra-cotta with several flues B, in the usual way. The block has a broad flat base, and along both sides there is a line of smallholes 0 opening from the outside of the pipe into the flue B, through which the surface water enters. W'hen,however, the block A is made of porous terracotta, the holes are unnecessary. At the end of each block the partitions 1) between the outer and bottom flues are cut away or apertured to allow passage for the drainage-water into the middle fine, and if there are four flues, as shown in the present case, the middle partition Z) has also a passage or aperture at each joint, so that all of the bottom flues are utilized for drainage.

Forsmallsewers thatis,allsewerslaid with entire pipes and not with sectional blocks I provide foundation-blocks, in which the sewer-pipes rest, as shown in Fig. 2. The blocks 0, which are placed beneath the joints, are made in lengths of twelve inches, with a concave seat to receive the pipe, a flat base and a triangular flue (l on either side.

The blocks D, which set between the joint bed-blocks and complete the foundation, are made in lengths of two feet, the ordinary length of a sewer-pipe being three feet, and each block has a curved inner face and a straight outer and bottom face, two of the blocksiD,when placed edge to edge, being of the same cross-section as the joint-block O, and each having a flue d, that forms a continuation of one'of the flues of theblock C. I preferably make the blocks D separate, as described, instead of one block, to save breakage, the block O being sufficient to prevent the foundation from spreading, and as the latter blocks are only half the length of the former there is not as much chance forbreakage in handling them.

Along each side of the base-blocks D and the outside of the blocks C there is a line of small holes a, affording ingress for the surface water to the flues, as in the ease of the sectional sewer-flues.

The foundation-blocks O and D may be made of porous terracotta, in which case the rows of holes e are not, as before stated, necessary, since the water will penetrate through the pores of the terra-cotta; but the bottoms of the flues should be glazed to allow the water to flow off freely.

It will be observed that the blocks D and O, above described, give a broad foundation for the sewer-pipe, and this feature, in connection with the perfect drainage of the adjacent ground, makes the sewer safe even in a ground that is loose and springy, and which would otherwise be unreliable.

I claim as my invention-- 1. A sewer having at its base a drainage fine or flues of porous terra-cotta, the bottoms of the fines being glazed, substantially as and for the purpose set forth.

2. The combination, with a sewer-pipe provided with foundation-blocks at its base, of flues formed within said blocks, and a series of holes for the passage of subsoil drainagewater into said fines, substantially as set forth.

The combination, with a sewer-pipe, of foundation blocks provided with concave seats, in which the pipe rests, the drainageflues formed within said blocks, and the series of lateral holes for the passage of subsoil drainage-water into said fines, substantially as set forth.

JOHN LYNCH.

\Vitnesses:

G. Y. Arline, W. l). HARDY. 

